Coroplast Alternatives Where to find pexiglass?

So I had a miniature C&C a few months back but I was forced to switch back to the little store bought.
I'm building anotehr one, and since my budget is low, is pexiglass expensive and where to get it?
I lack coroplast from my other one. But If i don't get pexiglass, I'm going to mend together the folded sides of a 96inx48in. How Will I make it stable enough for a cage? Do I just use tape and it'll be completely pee proof like new?

I want pexiglass because it gives a much nicer looking cage and a lot neater looking. My room is small and my coroplast is red and was cut into 2 different sections to make a cage. One Section is already folded and sides cut from the previous cage.

Can a uhual blanket be hand washed? I am not allowed to put piggies things in the washing machine.

And Also, my cage will have to be very high. what will hold a 2x4 cage up about 4-4.5ft high? And long story about the height, it needs to be high. and no, other animals is not the probelm.